Bi-annual	US dollars
1987-06-30	368
1987-12-31	317
1988-06-30	276
1988-12-31	217
1989-06-30	206
1989-12-31	163
1990-06-30	92
1990-12-31	114
1991-06-30	139
1991-12-31	123
1992-06-30	175
1992-12-31	138
1993-06-30	152
1993-12-31	194
1994-06-30	182
1994-12-31	97
1995-06-30	372
1995-12-31	124
1996-06-30	179
1996-12-31	151
1997-06-30	211
1997-12-31	150
1998-06-30	167
1998-12-31	176
1999-06-30	96